HMAS Onslow (SS60 / SSG60)

History

Australia's first submarine was the HMAS AE1, commissioned in 1914 before the First World War (1914-1918). The ship's legacy is a painful reminder of the dangers of underwater travel - the ship went missing at sea with its entire crew on September 14, 1914, and is still missing.

With its strategic position in the South Pacific, deep-sea submarines remain important to Australia's interests, despite the decades-long challenges of maintaining an effective military force, moves that are often addressed by simple economics. During World War II (1939-1945), the Australian submarine force was reduced to zero several times and no one served under the Royal Australian Navy (RAN) flag.

However, Australia's bases in Brisbane and Fremantle were vital to US, British and other allied submarines during the conflict, and Fremantle was only rivaled by Pearl Harbor in Hawaii, showing that The importance of submarine support in the Pacific during World War II.

The fortunes of Australian submarines changed during the Cold War when the government decided to allow the purchase of submarines for training purposes. The command then evolved into a full-fledged anti-submarine attack force based on the British-designed Oberon class.

The new group will consist of six people. The course has proven to be very popular around the world, with 27 of them completed, serving in the Royal Navy, Royal Navy, Brazilian Navy, Canadian Navy and Chilean Navy.

For Australians, one of the ships of this foreign-born class is HMAS Onslow (SS-60), her sister ships are HMAS Orion (S-61), HMAS Otama (SS-72), HMAS Otway ( S-59), HMAS Furnace (S-70) and HMAS Oxley (S-57). Onslow held her career from 1969 to 1999 before starting her second career as a well-preserved museum ship at the Australian National Maritime Museum in Sydney.

She was ordered in 1963 and her keel was seen on 4 December 1967 at Scotts Shipbuilding and Engineering in Greenock, Scotland. Launching began on December 3, 1968, and on December 22, 1969, the ship was officially commissioned under the surname Onslow, the surname of the Chief Justice of Australia, Sir Alexander Campbell Onslow (1842-1908) (also the name of the Western Australian town).

Her battle motto became "Festina Lente" - "Accelerate slowly", and her designated home port was HMAS Platypus Sydney.

When complete, the HMAS Onslow displaces 2,030 tonnes when it surfaced and 2,400 tonnes underwater. She has a length of 295 feet, a beam of 26.5 feet, and a draft of 18 feet. While she was still under construction, her original crew was 64, but by the time she was commissioned it had grown to 68. Her engines are conventional (as opposed to nuclear), with diesel-electric hybrid power consistent with submarine construction of this period. 2 x Admiralty Standard Range supercharged V16 diesel generators propel her to the surface and 2 x British electric motors propel her underwater.

Propulsion is sent to 2 axles aft and the Onslow can handle surface speeds of 12 knots and underwater speeds of up to 15-17 knots. The range is 9,000 nautical miles and the maximum depth is 660 feet. The Onslow was also fitted with a driver's access hatch to operate special forces - a feature her sisters did not have, and special soundproofing was introduced in the class, making her one of the quietest submarines of her era .

The Onslow had typical attack submarine weapons, carried by bow-mounted 6 x 21 in (533 mm) torpedo tubes (fired forward). This was supplemented by a rear mounted 2 x 21" duct (which was later removed).

The ship carried 20 torpedo reloads, initially a British Mark 8, then a Mark 23, and then an American Mark 48 Replaced by the Mod 4 series. Subsequently, the ship was modified with an update in the early 1980s to fire UGM-84 Sub Harpoon anti-ship missiles instead of torpedoes.

By this time, she also lost two rear-firing torpedoes due to the new generation The torpedoes are deployed on the bow tube, and these two torpedoes no longer have any tactical value.

Onslow uses a combination of sensors and processing systems on board. An Atlas Elektronik CSU3-41 sonar system was installed in the bow, while BAC 2007-type arrays were installed in the flank positions.

The ranging array consisted of Sperry BQG-4 "Mircopuffs" systems (a feature later installed) and the radar consisted of Kelvin Hughes Type 1006 series systems.

HMAS Onslow started her maritime career in 1970. In 1972, a disgruntled transfer disobeyed an order to close the forward ballast tanks, causing the ship to make a dangerously steep dive. Another submarine closed the valve just in time and the ship was able to return to the surface safely.

The incident resulted in the Royal Navy's submarine force only accepting volunteers to join its ranks, rather than being forced to enlist.

After being assigned to ANZUK in early July 1972, Onslow was transferred to Cockatoo Island Shipyard in May 1975 for an overhaul. In 1980, she participated in "Practice Kangaroo 3" which featured a simulated attack on a mobile battleship. Onslow managed to "sink" all seven "enemy" battleships in the scene, and proudly shows what Jolly Rogers will look like when he returns.

During a joint exercise with the Royal New Zealand Navy (RNZN) in March 1981, when the ship was submerged, one of Onslow's diesel engines began to smoke, causing carbon monoxide to fill the ship. One crew member died, 18 others passed out, and about 33 percent of the crew inhaled gas.

The cause of the engine failure was human error, although the crew's perceptions were different.

Between 1982 and 1984, Onslow underwent an overhaul, modifying her weapon kit and installing newer systems and sensors. Support for Harpoon anti-ship missiles makes her the first conventionally powered ship to be equipped with this useful offensive capability.

In the ensuing period, Onslow made several goodwill trips, including visits to the United States and Canada.

In the early 1990s, the Oberon class reached its useful end in Australian service. Four of the six ships were retired by the middle of the decade, leaving only Onslow and Otama in active service. A disturbing incident in 1995 tarnished Onslow's otherwise stellar career. Since then, the ship has served in other exercises, including RIMPAC 1998, and was officially decommissioned on 30 March 1999, HMAS Onslow.

In April of the same year, the ship was handed over to the museum for long-term preservation.

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